ENGINE HESITATION ?

[GTO600]

I'd check the relay connections inside the engine bay as they are probably corroded. If you pull the relays & unscrew the bases you should be able to pull them forward just enough to access, start by having an airline & blow out all the connections then spray with contact cleaner before ideally fitting new relays, if they are badly corroded then you should fit new bases but that's not easy to access !